Great discussion here. I was able to successfully change the double honk, bambi mode and fake engine noise. I wasn't able to change the number of turn signal flashes using:
SCCM 724-01-01 xxxx x*xx zz 0-3=1 Flash, 4-5=2 Flashes, 6-7=3 Flashes, 8,9=4 Flashes, A,B=5 Flashes, C,D=6 Flashes, E,F=7...